Label the endocrine glands in the figure.

Which of the following endocrine glands is unpaired?

Give the function$(s)$ of the following plant hormones:
$(i)$ Auxins $(ii)$ Gibberellins $(iii)$ Cytokinins $(iv)$ Abscisic acid $(v)$ Ethylene

$A$ doctor advised a patient to take less sugar in his diet. Mention the possible disease the patient would be suffering from? Explain.

How is the timing and the amount of hormone secreted by a gland regulated? Explain with an example.

Mention one function for each of these hormones:
$(a)$ Thyroxin
$(b)$ Insulin
$(c)$ Adrenaline
$(d)$ Growth hormone
$(e)$ Testosterone.